<template>
  <div>
    <!--面包屑导航区域 -->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>权限管理</el-breadcrumb-item>
      <el-breadcrumb-item>角色列表</el-breadcrumb-item>
    </el-breadcrumb>
    <!-- 卡片视图 -->
    <el-card>
      <!-- 添加角色按钮 -->
      <el-row>
        <el-col>
          <el-button type="primary">添加角色</el-button>
        </el-col>
      </el-row>

      <!-- 角色列表区域 -->
      <el-table :data="roleList" border stripe>
        <!-- 展开列 -->
        <el-table-column type="expand">
          <template slot-scope="scope">
            <el-row
              v-for="(item1, i1) in scope.row.children"
              :key="item1.id"
              :class="['bdbottom', i1 === 0 ? 'bdtop' : '', 'vcenter']"
            >
              <!-- 渲染一级权限 -->
              <el-col :span="5">
                <el-tag
                  closable
                  @close="removeRightById(scope.row, item1.id)"
                  >{{ item1.authName }}</el-tag
                >
                <i class="el-icon-caret-right"></i>
              </el-col>
              <!-- 渲染二级和三级权限 -->
              <el-col :span="19">
                <!-- 渲染二级权限 -->
                <el-row
                  v-for="(item2, i2) in item1.children"
                  :key="item2.id"
                  :class="[i2 === 0 ? '' : 'bdtop', 'vcenter']"
                >
                  <el-col :span="6">
                    <el-tag
                      type="success"
                      closable
                      @close="removeRightById(scope.row, item2.id)"
                      >{{ item2.authName }}</el-tag
                    >
                    <i class="el-icon-caret-right"></i>
                  </el-col>
                  <!-- 渲染三级权限 -->
                  <el-col :span="18">
                    <el-tag
                      type="warning"
                      v-for="(item3, i3) in item2.children"
                      :key="item3.id"
                      closable
                      @close="removeRightById(scope.row, item3.id)"
                      >{{ item3.authName }}</el-tag
                    >
                  </el-col>
                </el-row>
              </el-col>
            </el-row>
            <!-- <pre>
                        {{ scope.row }}
                        </pre
            > -->
          </template>
        </el-table-column>
        <!-- 索引列 -->
        <el-table-column type="index"></el-table-column>
        <el-table-column label="角色名称" prop="roleName"></el-table-column>
        <el-table-column label="角色描述" prop="roleDesc"></el-table-column>
        <el-table-column label="操作" width="400px">
          <template slot-scope="scope">
            <el-button size="mini" type="primary" icon="el-icon-search"
              >编辑</el-button
            >
            <el-button size="mini" type="danger" icon="el-icon-delete"
              >删除</el-button
            >
            <el-button
              size="mini"
              type="warning"
              icon="el-icon-setting"
              @click="showSetRightDialog(scope.row)"
              >分配权限</el-button
            >
          </template>
        </el-table-column>
      </el-table>
    </el-card>

    <!-- 分配权限对话框 -->
    <el-dialog
      title="分配权限"
      :visible.sync="SetRightDialogVisible"
      width="50%"
      @close="setRightDialogClosed"
    >
      <!-- 树形控件 -->
      <el-tree ref="treeRef" :data="rightsList" :props="treeProps" show-checkbox node-key="id" default-expand-all :default-checked-keys="defKeys"></el-tree>
      <span slot="footer" class="dialog-footer">
        <el-button @click="SetRightDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="allotRights"
          >确 定</el-button
        >
      </span>
    </el-dialog>
  </div>
</template>

<script>
export default {
  data() {
    return {
      //所有角色列表数据
      roleList: [],
      //控制分配权限对话框的显示与隐藏
      SetRightDialogVisible: false,
      //所有权限的数据列表
      rightsList:[],
      //树形控件属性绑定对象
      treeProps:{
          label:'authName',
          children:'children'
      },
      //默认选择的节点id值数组
      defKeys:[],
      //分配权限的角色id
      roleId:[],
    }
  },
  created() {
    this.getRolesList()
  },
  methods: {
    //获取所有角色的列表
    async getRolesList() {
      const { data: res } = await this.$http.get('roles')
      if (res.meta.status !== 200) {
        return this.$message.error('获取角色列表失败')
      } else {
        this.roleList = res.data
        // console.log(this.roleList)
      }
    },
    //根据id删除对应权限
    async removeRightById(row, id) {
      //弹框提示
      const confirmResult = await this.$confirm(
        '此操作将永久删除该文件, 是否继续?',
        '提示',
        {
          cancelButtonText: '取消',
          confirmButtonText: '确定',
          type: 'warning',
        }
      ).catch((err) => err)

      if (confirmResult !== 'confirm') {
        return this.$message.info('取消删除')
      } else {
        //发起请求删除指定权限
        const { data: res } = await this.$http.delete(
          `roles/${row.id}/rights/${id}`
        )
        if (res.meta.status !== 200) {
          return this.$message.error('删除权限失败')
        } else {
          this.$message.success('删除权限成功')
          row.children = res.data
        }
      }
    },
    //展示分配权限对话框
    async showSetRightDialog(role) {
        this.roleId=role.id;
          //获取所有权限的数据
          const {data:res} = await this.$http.get('rights/tree');
          if(res.meta.status!==200){
              return this.$message.error('获取权限数据失败');
          }else{
              //获取到的权限数据
             this.rightsList=res.data;
            //   console.log(this.rightsList);
          }
          //递归获取三级节点的id
          this.getLeafKeys(role,this.defKeys);
          this.SetRightDialogVisible=true;
    },
    //通过递归的形式获取角色下所有三级权限的id
    getLeafKeys(node ,arr){
        if(!node.children){
            return arr.push(node.id)
        }
        node.children.forEach(item => {
            this.getLeafKeys(item,arr)
        });
    },
    //监听分配权限对话框的关闭事件
    setRightDialogClosed(){
        this.defKeys=[];
    },
    //点击为角色分配权限
    async allotRights(){
        const keys=[
            ...this.$refs.treeRef.getCheckedKeys(),
            ...this.$refs.treeRef.getHalfCheckedKeys(),
        ]
        console.log(keys);
        const idStr=keys.join(',');

        const {data:res}=await this.$http.post(`roles/${this.roleId}/rights`,{rids : idStr});
        if(res.meta.status!==200){
            return this.$message.error('分配权限失败');
        }else{
            this.$message.success('分配权限成功');
            this.getRolesList();
            this.SetRightDialogVisible=false;
        }
    }
  },
}
</script>

<style scoped>
.el-tag {
  margin: 7px;
}
.bdtop {
  border-top: 1px solid #eee;
}
.bdbottom {
  border-bottom: 1px solid #eee;
}
.vcenter {
  display: flex;
  align-items: center;
}
</style>